[Help Wordpress] Separate the thumbs from the overflow on the left

Thanks, you totally solved the second problem, even better :)

About the first problem: http://imgur.com/HctzJEj
So I want the TOTAL width to remain the same, but for there to be a white line between the THUMBNAIL AREA and the OVERFLOW AREA.

The real problem currently is that when I set a
border: 1px solid #359bed;
to the LEFT rectangle(with image), it remains the same size in whole, so the right part is overlapped by the RIGHT rectangle(with thumbnails) by 2 pixels. The only way to fix this was to set
margin-left: -2px;
to the LEFT rectangle, so that it moves itself 2 pixels left. That fixes the problem with overlapping, BUT that moves it left by 2 pixels, so its out of place.
Is there some other solution?
thanks

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help.dimsemenov.com